dana bash reporting live for us this morning. dan lothian is in denver, following the obama campaign. what has the president done for final preparations? >> well, he will be, this morning, going through the briefing books again, doing some final preparations and as you heard earlier, doing a walk-through later this afternoon of the venue. but the bulk of the work has happened over the last couple of days as a president was in nevada, which is, of course, a key battleground state, going through the debate camp. senator john kerry playing the role of governor romney. that's good for two reasons at least for the obama campaign because he knows mitt romney very well, coming from the state of massachusetts, but also is veteran debater himself. he's been helping the president out. now, the thing that we'll be watching for is what the real push will be from the obama campaign. and the romney campaign tonight in terms of their overall theme. as you know, it is all about domestic policies, so they're talking about the economy, about healt